2.
\((1)\int_{0}^{2}{(2-|1-x|)}dx=\)________.
\((2)\)设\(f\left(x\right)=\begin{cases}\lg x\;\;x > 0 \\ x+\int _{0}^{a}3{t}^{2}dt\;\;\;\;x\leqslant 0\end{cases} \),若\(f(f(1))=1\),则\(a=\)______.
\((3)\)函数\(f(x)=x^{2}+2x+a\ln x\),若函数\(f(x)\)在\((0,1)\)上单调,则实数\(a\)的取值范围是
\((4)\)已知函数\(f(x)\)是定义在\(R\)上的奇函数,\(f(1)=0\),\(\dfrac{x{f}{{{'}}}(x)-f(x)}{{{x}^{2}}} > 0(x > 0)\),则不等式\(f(x) > 0\)的解集是___________________.